Main Entry: hal·lu·ci·na·tion
Pronunciation: h-lüs--n-shn
Function: noun: the awareness of something (as a visual image, a sound, or a smell) that seems to be experienced through one of the senses but is not real, cannot be sensed by someone else, and is usually the result of mental disorder or the effect of a drug; also: something of which one is aware but which is not real